Fig. 202. Fig. 203. The screw thread for small bolts is represented by thick and thin lines, such as was shown in Figure 152, but in larger sizes; the angles of the thread also are drawn in, as in Figure 202, and the method of doing th... Read more of Screw Threads And Spirals at How to Draw.caInformational Site Network Informational
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Erigeron





Category: Terms

Genus of composite herbs having flower heads resembling asters. Formerly
used as a diuretic and as a hemostatic in uterine hemorrhage





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